Steering device for motor vehicles



' P. M. WILSON. smnme ounce FOR MOTOR vzmms.

AEPLICAHION FILED AUG-l5. 192

W Patented May 1;;11 W2" 2 SHEETS-SHEET 1.

P. M. WILSON. STEERING DEVICE FOR MOTOR VEHICLES- y 23, M2 @111 2SHEETS-SHEET APPEICAHON FILED AUG-I5, I92!- Device for Motor Vehicles,which improve rnrnn iuflwinsciv. on 'iunnsnInns, rnalvcn.

srnnnrne nnvrcn Leon MOTOR, vnr-ircnns.

To aZZ whom it may concern:

Be it knownthat T, Pnrnu M. VVrLsoN, citizen of the United States ofAmerica, and resident of Marseille,Franc post flice address 25 Rue de laRpublique, have invented new and useful Improvements in a Steering mentsare fully set forth in the following specification. a

On certain motor vehicles and, more particularly, on certainagriculturalftractors, the two driving wheels are independent oi eachother, and steering is obtained byceasing to drive one of the wheels,that at the side to which it is desired to turn, whilst the other wheelcontinues to receive the action of the driving force.

This invention relates to a steering device of the type with independentdriving wheels, with cessation of drive on the wheel mounted at the sideof the rotation.

To make the following explanation as clear as possible, the accompanyingdrawing shows by way of example the device according to the invention.

Flgure 1 1s a central vertical partial section of an axle journal onwhich is mounted I which can freely rotate a rim d. A toothed a drivingwheel,

Figure 2 is a halt-section through a plane at right angles to that ofFigure 1, and

Figures 3 and 4: are detail views.

On the journal a of the axle is mounted by any suitable means ofindustrial practice, the hub 5 of a wheel a of any desired construction.

The said hub b has at b an extension on wheel e is either secured to therim d or made in one piece with the same, and the Stud toothed wheel 61s glven a movement of rotation by the act1on ot a dr1v1ng toothedpinion not shown in the drawing.

The rim 0? has at f a slot through which can swing a pawl g secured to atail 9. The pawl g and its tail 9' can swing about a pin Z2 rnrriedbyany desired means on the rim (1?. The tail 9 can terminate in aroller, or

in a rounded off part, engaging with a slot 71 provided. in a secondrim, called brake rim j mounted loose on the hub rZ'- of the rim d andprovided at 7''" with a machined surface over which passes the brakeband. The groove i provided in the said rim 7', with which engages theend of the tail of the pawl, has a shape (Figure 4).

Two helical springs or two springs it of Specification of LettersPatent. :lPflt'ljflEntqgfl RK 2 33; Application filed August 15, 1921.Serial No. 492,251

any other shape are arranged asshown in Figures land 3, inthe spacecomprised between the two rims d and j. These springs rest on the onehand, against a projection] secured to the rim j and on the other hand,against stops m provlded on the rim (Z .at

eitherside of the slot 7.

'On the inner disc 0 of the wheel are provided. openings 0 in which canbe placed and held by means of cotter pins 7) blocks 1 projectinginwards at the side of the rim ZZL These blocks g of any desired number,are arranged in a circle on the disc 0. The workingof the apparatus isas follows: :the pawl g occupying the position in fulllines shown in Figure 1* that is to say projecting outside the slot f and at the side ofthe disc 0. If a movement of retation. is transmitted to the toothedwheel e, the rim cl will begin to rotate, and the said rim, by means ofthe pawl 9, will drive the wheel 0 c owing to the said pawl 9 meetingwith one of the stops q. At the same time, the rim cl drives by means ofone of the springs 70 (according to the direction of rotation) the brakerim 7', and the whole rotates.

It at a given moment it is desired to stop the rotation of the wheel 0c, the brake of the rim j is operated so as to stop the latter; a fixedpoint, of support is therefore produced for the moment. Thus a relativemovement of the two rims (Z, is produced, and it will be understood thatin these conditions the tail g of the pawl will move in the groove 2'andcompress one of the two springs 7c. But in view of the shape otthesaa;

so it said groove 2', and whatever he the direction of rotation, themovement of the tail 9 in the said groove will produce the disappearanceof the pawl g, that is to say the return of the said pawl into the spacebetween the two rims (Z and j. The pawlno ].o1'1.,g;e1"projectingoutwards, is no longer in contact to the top of the V, as shown inFigured,

and the pawl gswings about the pin it in order to project outwards fromthe slot f. The driving of the wheel takes place therefore as before.

It will be seen that owing to this device, it will be possible by asimple braking action, or by the locking by any means of the rim j, tobring about the release of the wheel,

' the throwing into gear taking place on the release of the rim y.

Y The action producing the locking of the rim j, could be effected fromthe drivers seat by any suitable means controlled by hand or by thefoot.

Claims:

1.. A steering device for motor vehicles of the type with independentdriving wheels and cessation of the driving of one of the wheels,chiefly characterized by: two independentrims, an elastic coupling partbetween the two rims, a brake on one of them, an oscillating drivingparton the other rim constituting the driving rim, stops on the wheel in thetrack of the driving part, a device for bringing about disappearance ofthe driving part when the brake rim is stopped or locked.

2. A steering device for motor vehieles of the type with independentdriving wheels and cessation of drive on one ot the wheels,substantially characterized by: two independent rims, springs connectingtogether the two rims, a brake on one of them, a pawl oscillatingthrough a slot of the other rim, a device for withdrawing the drivingpart when the brake rim is locked.

8. A steering device "for motor vehicles of the type with independentdriving wheels and cessation of drive on one oil the wheels, chieflycharacterized by: two indemndent rims, springs connecting together thetwo rims, a brake on one of them, a pawl swinging through a slot of theother rim, a, tail on the said pawl, a V-shaped groove on the brake rim,"for receiving the tail ol? the pawl, a brake band on the brake rim.

In testimony whereof I have signed this specification in the presence oftwo suhseribing witnesses.

PETER M. WILSON.

itnesses Lnwrs B. R. SPARKS, Mnnnron Nonssnr.

